442265561 has 16 divisors (see below), whose sum is σ = 464375808. Its totient is φ = 420714000.

The previous prime is 442265539. The next prime is 442265569. The reversal of 442265561 is 165562244.

It is a cyclic number.

It is not a de Polignac number, because 442265561 - 2¹⁴ = 442249177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442265569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500426 + ... + 501308.

It is an arithmetic number, because the mean of its divisors is an integer number (29023488).

Almost surely, 2^442265561 is an apocalyptic number.

It is an amenable number.

442265561 is a deficient number, since it is larger than the sum of its proper divisors (22110247).

442265561 is a wasteful number, since it uses less digits than its factorization.

442265561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172.

The product of its digits is 57600, while the sum is 35.

The square root of 442265561 is about 21030.1108175872. The cubic root of 442265561 is about 761.8936853809.

The spelling of 442265561 in words is "four hundred forty-two million, two hundred sixty-five thousand, five hundred sixty-one".